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All results from a given calculation for C4H5NO (Isoxazole, 5-methyl-)

using model chemistry: MP2/6-31G

19 10 17 12 22

States and conformations

State Conformation minimum conformation conformer description state description
1 1 yes C1 1A
Energy calculated at MP2/6-31G
 hartrees
Energy at 0K-284.097442
Energy at 298.15K-284.103675
HF Energy-283.485177
Nuclear repulsion energy218.164138
The energy at 298.15K was derived from the energy at 0K and an integrated heat capacity that used the calculated vibrational frequencies.
Vibrational Frequencies calculated at MP2/6-31G
Mode Number Symmetry Frequency
(cm-1)
Scaled Frequency
(cm-1)
IR Intensities
(km mol-1)
Raman Act
4/u)
Dep P Dep U
1 A 3300 3158 0.07      
2 A 3283 3141 1.82      
3 A 3164 3027 10.12      
4 A 3153 3016 10.17      
5 A 3072 2939 13.25      
6 A 1639 1569 19.35      
7 A 1568 1500 12.49      
8 A 1547 1480 8.78      
9 A 1492 1428 2.63      
10 A 1446 1384 17.23      
11 A 1346 1288 13.17      
12 A 1247 1193 11.25      
13 A 1208 1155 7.97      
14 A 1122 1074 2.10      
15 A 1076 1030 4.15      
16 A 1048 1003 2.31      
17 A 943 902 7.55      
18 A 916 876 6.51      
19 A 828 792 22.99      
20 A 782 748 12.06      
21 A 752 720 27.90      
22 A 647 619 0.78      
23 A 618 591 2.78      
24 A 598 572 0.01      
25 A 333 319 2.24      
26 A 237 227 2.98      
27 A 96 91 0.93      

Unscaled Zero Point Vibrational Energy (zpe) 18729.5 cm-1
Scaled (by 0.9568) Zero Point Vibrational Energy (zpe) 17920.4 cm-1
See section III.C.1 List or set vibrational scaling factors to change the scale factors used here.
See section III.C.2 Calculate a vibrational scaling factor for a given set of molecules to determine the least squares best scaling factor.
Rotational Constants (cm-1) from geometry optimized at MP2/6-31G
ABC
0.29408 0.11307 0.08295

See section I.F.4 to change rotational constant units
Geometric Data calculated at MP2/6-31G

Point Group is C1

Cartesians (Å)
Atom x (Å) y (Å) z (Å)
C1 -2.146 0.016 0.000
H2 -2.504 -0.519 0.890
H3 -2.580 1.024 -0.001
H4 -2.504 -0.520 -0.889
C5 -0.651 0.119 -0.000
O6 0.057 -1.101 0.000
N7 1.508 -0.793 -0.000
C8 1.553 0.556 0.000
H9 2.525 1.035 0.000
C10 0.250 1.162 0.000
H11 0.024 2.221 -0.000

Atom - Atom Distances (Å)
  C1 H2 H3 H4 C5 O6 N7 C8 H9 C10 H11
C11.09801.09741.09801.49862.46993.74303.73844.78092.65653.0940
H21.09801.78291.77872.15202.77254.11874.29015.33803.34713.8328
H31.09741.78291.78292.13053.38644.47414.15965.10502.83402.8663
H41.09801.77871.78292.15202.77224.11854.29025.33823.34743.8333
C51.49862.15202.13052.15201.41052.34442.24713.30551.37832.2075
O62.46992.77253.38642.77221.41051.48362.23213.26382.27073.3218
N73.74304.11874.47414.11852.34441.48361.34982.09192.32473.3598
C83.73844.29014.15964.29022.24712.23211.34981.08361.43662.2606
H94.78095.33805.10505.33823.30553.26382.09191.08362.27792.7676
C102.65653.34712.83403.34741.37832.27072.32471.43662.27791.0831
H113.09403.83282.86633.83332.20753.32183.35982.26062.76761.0831

picture of Isoxazole, 5-methyl- state 1 conformation 1
More geometry information
Calculated Bond Angles
atom1 atom2 atom3 angle atom1 atom2 atom3 angle
C1 C5 O6 116.178 C1 C5 C10 134.812
H2 C1 H3 108.608 H2 C1 H4 108.190
H2 C1 C5 111.014 H3 C1 H4 108.609
H3 C1 C5 109.339 H4 C1 C5 111.014
C5 O6 N7 108.175 C5 C10 C8 105.909
C5 C10 H11 127.082 O6 C5 C10 109.010
O6 N7 C8 103.857 N7 C8 H9 118.151
N7 C8 C10 113.049 C8 C10 H11 127.009
H9 C8 C10 128.800
Electronic energy levels
Charges, Dipole, Quadrupole and Polarizability